Nice arrangement Jorge! And nice picks by all!
In regards to wall jumping, can you just sit and try it for awhile and figure out a pattern or "beat" to do it right? I don't even think about it now, but I remember learning to do it that way. I initially got stuck in the area where the Etecoons teach you about the wall jump and when I couldn't get it to work enough to get out, I reset and quit. Later I thought, "I know it's possible, and I want to beat this at 100%" so I sat down and made it a beat-like pattern of button presses until I got out. After multiple playthroughs of Super Metroid and several other Metroid/non-Metroid games with the wall jump, I don't even think about how to do it anymore. I don't know if that will help in any way...but maybe.